the un said they pushed onto the city using sophisticated equipment. the worry is that this war will pull in regional powers. erin? >> thank you very much. droning have been crisscrossing the skies over gaza for days. we got a tour behind those drones. >> reporter: before the booms and the blasts, a hum. droning were in the air space over gaza and even after the cease fire, they will rerain. days before the conflict broke out, cnn was on the ground to get an inside look. we visited the biggest manufacturer. the company does $3.5 billion annual sales. a quarter of that go to the ministry of defense. >> we can see repositioned. uav's are planes without pilots and they are operated with the click of a mouse >> this is something that is better to be done by an unmanned capability. >> the flying is with a trackball and i'm commanding the direction and the uav will follow my command. when i want to land or take off a need to click a button >> a short drive away, the parts of the drone are crafted. >> it is a high tr-tech nolg. >> that allows the drones to se